zoudan commented on code in PR #3237:
URL: https://github.com/apache/calcite/pull/3237#discussion_r1219477427
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core/src/main/java/org/apache/calcite/sql/fun/SqlLibraryOperators.java:
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@@ -937,6 +937,14 @@ private static RelDataType
arrayReturnType(SqlOperatorBinding opBinding) {
ReturnTypes.LEAST_RESTRICTIVE,
OperandTypes.AT_LEAST_ONE_SAME_VARIADIC);
+ /** The "ARRAY_TO_STRING(array, delimiter [, nullText ])" function. */
+ @LibraryOperator(libraries = {BIG_QUERY})
+ public static final SqlFunction ARRAY_TO_STRING =
+ SqlBasicFunction.create(SqlKind.ARRAY_TO_STRING,
+ ReturnTypes.explicit(SqlTypeName.VARCHAR)
Review Comment:
good idea
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